/*
 * Copyright (c) 2006-2008 Shane Mc Cormack
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * SVN: $Id$
 */

package uk.org.dataforce.kde;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

/**
 * Hold a Process and stream readers for a KDialog Process
 */
public class KDialogProcess {
	/** Is kdialog in /bin? */
	private final static boolean isBin = (new File("/bin/kdialog")).exists();
	
	/** Does KDialog exist? */
	private final static boolean hasKDialog = (new File("/usr/bin/kdialog")).exists() || isBin;	

	/** Stream for the stdout stream for this process */
	private final StreamReader stdOutputStream;
	
	/** Stream for the stderr stream for this process */
	private final StreamReader stdErrorStream;
	
	/** The actual process for this process */
	private final Process process;
	
	/**
	 * Execute kdialog with the Parameters in params
	 *
	 * @param params Parameters to pass to kdialog
	 */
	public KDialogProcess(final String[] params) throws IOException {
		final String[] exec = new String[params.length+1];
		System.arraycopy(params, 0, exec, 1, params.length);
		exec[0] = (isBin) ? "/bin/kdialog" : "/usr/bin/kdialog";
		process = Runtime.getRuntime().exec(exec);
		stdOutputStream = new StreamReader(process.getInputStream(), new ArrayList<String>());
		stdErrorStream = new StreamReader(process.getErrorStream(), new ArrayList<String>());
		stdOutputStream.start();
		stdErrorStream.start();
	}
	
	/**
	 * Does this system have kdialog?
	 *
	 * @return True if kdialog was found, else false
	 */
	public static boolean hasKDialog() {
		return hasKDialog;
	}
	
	/**
	 * Get the process object for this KDialogProcess
	 *
	 * @return The process object for this KDialogProcess
	 */
	public Process getProcess() {
		return process;
	}
	
	/**
	 * Get the StreamReader for this KDialogProcess's stdout stream
	 *
	 * @return The StreamReader for this KDialogProcess's stdout stream
	 */
	public StreamReader getStdOutStream() {
		return stdOutputStream;
	}
	
	/**
	 * Get the StreamReader for this KDialogProcess's stderr stream
	 *
	 * @return The StreamReader for this KDialogProcess's stderr stream
	 */
	public StreamReader getStdErrStream() {
		return stdErrorStream;
	}
	
	/**
	 * Wait for the process to finish.
	 */
	public void waitFor() throws InterruptedException {
		process.waitFor();
	}
}